Thrust-bearing for drill-spindles.



T. H. LOVEJOY.

THRUST BEARING FOR DRILL SPINDLES. APPLICATION FILED SEPT-1 5, 19H.

l lfifidgfiw Patented Apr.13,1915.

THE NORRIS PETERS CO.,IPHUTO LITHO., WASHINGTON. D. C

, nit ic.

THOMAS H. LOVEIOY, OF CHICAGO, ILLINOIS.

THRUST-BEARING FOR DRILL-SPINDLES.

Specification of Letters Patent.

Application filed September 15, 1911. Serial No. 649,508.

and more particularly to that type of spindles used in connection with track drills. The object of my inventionis to produce a spindle comprising a feeding member and a holder, having a swivel connection therebetween, which shall be strong, durable, cheap to manufacture, easily assembled, dust able. 1 7

My invention furthermore consists in the novel construction of parts and devices and in the novel combinations of parts and devices herein shown, described and claimed. In the drawings forming a part of this specification, Figure 1 isa vertical section showing my improved spindle as applied to a track drill. Fig. 2 is a longitudinal section upon an enlarged scale showing in detail the spindle. Fig. 3 is a transverse section taken on the line 3-3 of Fig. 2 looking in the direction of the arrows.

In the drawings 10 denotes the base and 11 the uprights formed rigidly therewith and 12 the spaced cross bars between the upri hts in which is formed a rear support for the spindle. 13 is the U-shaped yoke having the front cross piece 9 in which is formed the front bearing for the spindle hereinafter described. Pivotally mounted on the U-shaped member 13 are the spaceduprig'ht standards 14 having at the top thereof spaced cross pieces 15, said uprights 14 being held in position by means of pivoted bars 16 pivoted at their inner ends and at their outer ends respectively to the standards 14 and the rearwardly extended portions of the U-shaped member 13. Also pivoted to the U-shaped member 13 is the hook 17 adapted to embrace the rail or other object to be operated upon and which is connected to the standards 14 by means of the spring 18. Mounted in the standards 14 and cross bars 15 is the operating shaft 19 deriving its motion from a cross shaft 20 by means of beveled gears, said cross shaft 20 being operated by a crank. At the lower end of the shaft 19 is keyed the bevel gear my invention as the same duced inner end 28.

21 meshing with the corresponding gear22 adapted to rotate and slide on the holder member 23 of my improved spindle. The structure above described forms no part of is shown and described in the patent issued to A. R. Paulus, May 20, 1890, No. 428516. tween the cross bars 12 is the internally threaded gear 24 adapted to be intermittently rotated by any suitable pawl and ratchet means such as shown at 25. The

member 26 has at its inner end formed integrally therewith a collar 27 and a re- Cooperating with the the tool holder 23 adapted to receivea drill or other tool 28 at its inner end and retained by means of any well known retaining device such as the set screw 29. On the rear end of this tool.

holder-23 is formed a socket 30 in which is adapted to fit the reduced end 28 of the feed member 26. Between the rear end of the holder 23 and the collar 27 of the feed screw 26 and surrounding the reduced end are ball-bearing plates or raceways 31 having mounted therebetween ball-bearings 32. To retain these members 26 and 23 in their proper relation I provide a two part incasing sleeve 33. This incasing sleeve comprises a member 34 fitted to the rear end of the holder 23 and abutting a shoulder 35 thereon and keyed thereto by means of the pin 36. The member 34 is provided with an interior shoulder 341 adapted to bear against one of the bearing plates 31 and is furthermore provided with an interior threaded portion 37 at its rear end in which screws the other member 38 of the sleeve 33 and which member 38 may be adjusted within said member 34 to provide for or take up the wear between the movable parts. By the structure described it will be apparent that I have provided a swivel connection between the feeding member and the tool holder which is exceedingly strong and one that is practically dust proof.

A feeding member may be considered a pressure supplying member, and a tool holder a pressure-receiving member. The pressure in this device is always toward the article being drilled, and the sleeve and pin connection shown and already described, affords, a material aid in the transmission of this pressure, enlarging materially the Patented Apr. 13, 1915.

Mounted begear 24 is adapted to feed the screw threaded feed member 26 of the spindle. The feed bearing surfaces. and reducing correspond-i inglyi the chance of damage to the device I through the transmission of too sudden in- 1 crease of pressure through the manual manipulation of the feed screw. a WVhat I claim is: I

1. In a device of the; class described, the combination of a pressure supplying memher having a reduced cylindrical end and an enlarged cylindrical collar adjacent thereto, a pressure receiving 'member having a ing member to the pressure receiving memher, substantially as specified. I

2. In a device of'the class described, in combination, we members having a swiveled connection therebetween, one of said mem-' bers having an enlarged collarand a reduced cylindrical end portion adapted to fit in a correspondingly shaped socket in the adjacent end of; the other member, bearing balls and bearing plates surrounding the cylindrical portion and interposed between "the collar and the end of the second named member, a sleeve portion pinned to the second named member and havinga shoulder contacting one of the ball bearing plates and having. also a threaded end, and a second Copies of this patent maybe obtained for between said members.

sleeve portion fitting the first named member adjacent the collar thereon and having a threaded part coacting with the threaded end of the first named sleeve portion, substantially. as specified.

3.- In a device of the character described, the combination of a pressure-supplying member and a pressure-receiving member having a ball-bearing swivel connection therebetween and a sleeve embracing said swivel connection, said sleeve comprising two pieces provided with cooperating interengaging threaded portions, one of said portions being pinned to the pressurereceiving member and having an abutment shoulder against which some of the pressure .is received from the pressure supplying member to aid in transmitting pressure from the pressure supplying member to the pressure-receiving member. 7 a

4. In a device of the character described, the combination of a screw threaded member having an integral collar formed thereon and constituting a pressure-supplying member, apressure-receiving member having a bearing shoulder thereon and a ball-bearing swivel connection between said members and a sleeve engaging behind said shoulder and .said collar and adapted to aid in the transmission of pressure from the pressure-supplying member to the pressure-receiving member and to prevent the entrance of dust and other foreign matter'to the connection T. H. LOVEJOY. Witnesses:

PEARL ABRAMS,

H. M. MUNDAY.

five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

